Global Patent Index - EP 3958351 A1

EP 3958351 A1 20220223 - NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Title (en)

NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Title (de)

SEKUNDÄRBATTERIE MIT WASSERFREIEM ELEKTROLYT

Title (fr)

BATTERIE SECONDAIRE À ÉLECTROLYTE NON AQUEUX

Publication

EP 3958351 A1 20220223 (EN)

Application

EP 20790421 A 20200415

Priority

  • JP 2019079975 A 20190419
  • JP 2020016486 W 20200415

Abstract (en)

The purpose of the present disclosure is to provide a non-aqueous electrolyte secondary battery having high capacity. In a non-aqueous electrolyte secondary battery that is one example of the embodiment, a positive electrode mix layer comprises a positive electrode active material comprising a lithium transition metal composite oxide represented by general formula: Li<sub>a</sub>Ni<sub>b</sub>Co<sub>(1-b-c)</sub>Al<sub>c</sub>O<sub>d</sub> (0.9 < a ≤ 1.2, 0.88 ≤ b ≤ 0.96, 0.04 ≤ c < 0.12, 1.9 ≤ d ≤ 2.1) and lithium carbonate in an amount of 0.1 to 1.0% by mass relative to the mass of the positive electrode active material. The lithium transition metal composite oxide has the form of secondary particles formed by the aggregation of primary particles, wherein tungsten is present, on the surface of each of the primary particles, in an amount of 0.05 to 0.20 mol% relative to the total molar amount of non-Li-metal elements contained in the positive electrode active material.

IPC 8 full level

H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01)

CPC (source: EP US)

H01M 4/364 (2013.01 - US); H01M 4/366 (2013.01 - EP US); H01M 4/525 (2013.01 - EP US); H01M 4/62 (2013.01 - EP US); H01M 4/621 (2013.01 - EP); H01M 10/4235 (2013.01 - US); H01M 2004/028 (2013.01 - EP US); Y02E 60/10 (2013.01 - EP)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3958351 A1 20220223; EP 3958351 A4 20220629; CN 113692655 A 20211123; JP WO2020213617 A1 20201022; US 2022216470 A1 20220707; WO 2020213617 A1 20201022

DOCDB simple family (application)

EP 20790421 A 20200415; CN 202080029164 A 20200415; JP 2020016486 W 20200415; JP 2021514179 A 20200415; US 202017603372 A 20200415